Draft: Update Bitcoin Wallet [testnet3] to 10.06, build within container
This is an alternative approach that uses a container to produce an environment suitable for reproducible builds.
Compared to the current approach,
- it should protect the build against changes to the F-Droid build image (e.g. a switch from Debian Bullseye to Bookworm).
- it moves the mounting of disorderfs into the container and out of the F-Droid build recipe.
- it properly unmounts disorderfs when cleaning up.